Adding 'reboot=a,b,k,p,c' per suggestion in comment #55 helped me resolve this issue on Dell Latitude E6420 on Ubuntu 11.04 amd64 . You should try several options, since kernel will probe every listed method until one of them works.
Adding 'reboot=a,b,k,p,c' per suggestion in comment #55 helped me resolve this issue on Dell Latitude E6420 on Ubuntu 11.04 amd64 . You should try several options, since kernel will probe every listed method until one of them works.